net: phy: dp83867: support Wake on LAN

This adds WoL support on TI DP83867 for magic, magic secure, unicast and
broadcast.
Signed-off-by: Thomas Haemmerle <thomas.haemmerle@wolfvision.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/dp83867.c

@@ -12,6 +12,8 @@
 #include <linux/of.h>
 #include <linux/phy.h>
 #include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
 
 #include <dt-bindings/net/ti-dp83867.h>
 
@@ -21,8 +23,9 @@
 #define MII_DP83867_PHYCTRL	0x10
 #define MII_DP83867_MICR	0x12
 #define MII_DP83867_ISR		0x13
-#define DP83867_CTRL		0x1f
+#define DP83867_CFG2		0x14
 #define DP83867_CFG3		0x1e
+#define DP83867_CTRL		0x1f
 
 /* Extended Registers */
 #define DP83867_CFG4            0x0031
@@ -36,6 +39,13 @@
 #define DP83867_STRAP_STS1	0x006E
 #define DP83867_STRAP_STS2	0x006f
 #define DP83867_RGMIIDCTL	0x0086
+#define DP83867_RXFCFG		0x0134
+#define DP83867_RXFPMD1	0x0136
+#define DP83867_RXFPMD2	0x0137
+#define DP83867_RXFPMD3	0x0138
+#define DP83867_RXFSOP1	0x0139
+#define DP83867_RXFSOP2	0x013A
+#define DP83867_RXFSOP3	0x013B
 #define DP83867_IO_MUX_CFG	0x0170
 #define DP83867_SGMIICTL	0x00D3
 #define DP83867_10M_SGMII_CFG   0x016F
@@ -65,6 +75,13 @@
 /* SGMIICTL bits */
 #define DP83867_SGMII_TYPE		BIT(14)
 
+/* RXFCFG bits*/
+#define DP83867_WOL_MAGIC_EN		BIT(0)
+#define DP83867_WOL_BCAST_EN		BIT(2)
+#define DP83867_WOL_UCAST_EN		BIT(4)
+#define DP83867_WOL_SEC_EN		BIT(5)
+#define DP83867_WOL_ENH_MAC		BIT(7)
+
 /* STRAP_STS1 bits */
 #define DP83867_STRAP_STS1_RESERVED		BIT(11)
 
@@ -130,6 +147,115 @@ static int dp83867_ack_interrupt(struct phy_device *phydev)
 	return 0;
 }
 
+static int dp83867_set_wol(struct phy_device *phydev,
+			   struct ethtool_wolinfo *wol)
+{
+	struct net_device *ndev = phydev->attached_dev;
+	u16 val_rxcfg, val_micr;
+	u8 *mac;
+
+	val_rxcfg = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_RXFCFG);
+	val_micr = phy_read(phydev, MII_DP83867_MICR);
+
+	if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_UCAST |
+			    WAKE_BCAST)) {
+		val_rxcfg |= DP83867_WOL_ENH_MAC;
+		val_micr |= MII_DP83867_MICR_WOL_INT_EN;
+
+		if (wol->wolopts & WAKE_MAGIC) {
+			mac = (u8 *)ndev->dev_addr;
+
+			if (!is_valid_ether_addr(mac))
+				return -EINVAL;
+
+			phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFPMD1,
+				      (mac[1] << 8 | mac[0]));
+			phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFPMD2,
+				      (mac[3] << 8 | mac[2]));
+			phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFPMD3,
+				      (mac[5] << 8 | mac[4]));
+
+			val_rxcfg |= DP83867_WOL_MAGIC_EN;
+		} else {
+			val_rxcfg &= ~DP83867_WOL_MAGIC_EN;
+		}
+
+		if (wol->wolopts & WAKE_MAGICSECURE) {
+			phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFSOP1,
+				      (wol->sopass[1] << 8) | wol->sopass[0]);
+			phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFSOP1,
+				      (wol->sopass[3] << 8) | wol->sopass[2]);
+			phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFSOP1,
+				      (wol->sopass[5] << 8) | wol->sopass[4]);
+
+			val_rxcfg |= DP83867_WOL_SEC_EN;
+		} else {
+			val_rxcfg &= ~DP83867_WOL_SEC_EN;
+		}
+
+		if (wol->wolopts & WAKE_UCAST)
+			val_rxcfg |= DP83867_WOL_UCAST_EN;
+		else
+			val_rxcfg &= ~DP83867_WOL_UCAST_EN;
+
+		if (wol->wolopts & WAKE_BCAST)
+			val_rxcfg |= DP83867_WOL_BCAST_EN;
+		else
+			val_rxcfg &= ~DP83867_WOL_BCAST_EN;
+	} else {
+		val_rxcfg &= ~DP83867_WOL_ENH_MAC;
+		val_micr &= ~MII_DP83867_MICR_WOL_INT_EN;
+	}
+
+	phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFCFG, val_rxcfg);
+	phy_write(phydev, MII_DP83867_MICR, val_micr);
+
+	return 0;
+}
+
+static void dp83867_get_wol(struct phy_device *phydev,
+			    struct ethtool_wolinfo *wol)
+{
+	u16 value, sopass_val;
+
+	wol->supported = (WAKE_UCAST | WAKE_BCAST | WAKE_MAGIC |
+			WAKE_MAGICSECURE);
+	wol->wolopts = 0;
+
+	value = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_RXFCFG);
+
+	if (value & DP83867_WOL_UCAST_EN)
+		wol->wolopts |= WAKE_UCAST;
+
+	if (value & DP83867_WOL_BCAST_EN)
+		wol->wolopts |= WAKE_BCAST;
+
+	if (value & DP83867_WOL_MAGIC_EN)
+		wol->wolopts |= WAKE_MAGIC;
+
+	if (value & DP83867_WOL_SEC_EN) {
+		sopass_val = phy_read_mmd(phydev, DP83867_DEVADDR,
+					  DP83867_RXFSOP1);
+		wol->sopass[0] = (sopass_val & 0xff);
+		wol->sopass[1] = (sopass_val >> 8);
+
+		sopass_val = phy_read_mmd(phydev, DP83867_DEVADDR,
+					  DP83867_RXFSOP2);
+		wol->sopass[2] = (sopass_val & 0xff);
+		wol->sopass[3] = (sopass_val >> 8);
+
+		sopass_val = phy_read_mmd(phydev, DP83867_DEVADDR,
+					  DP83867_RXFSOP3);
+		wol->sopass[4] = (sopass_val & 0xff);
+		wol->sopass[5] = (sopass_val >> 8);
+
+		wol->wolopts |= WAKE_MAGICSECURE;
+	}
+
+	if (!(value & DP83867_WOL_ENH_MAC))
+		wol->wolopts = 0;
+}
+
 static int dp83867_config_intr(struct phy_device *phydev)
 {
 	int micr_status;
@@ -464,6 +590,9 @@ static struct phy_driver dp83867_driver[] = {
 		.config_init	= dp83867_config_init,
 		.soft_reset	= dp83867_phy_reset,
 
+		.get_wol	= dp83867_get_wol,
+		.set_wol	= dp83867_set_wol,
+
 		/* IRQ related */
 		.ack_interrupt	= dp83867_ack_interrupt,
 		.config_intr	= dp83867_config_intr,